I have had the same issue with a 7600GS and to solve the problem I use Envy to install a working set of drivers. This was working until 0704 because I just did a fresh install and now on every reboot t decides to reinstall the non-working nvidia drivers, if you can figure out how to disable the install on reboot you shouldbe all set.

When A/V Wizard starts it always outputs 640x480 on the VGA connector. So, if you are not using the VGA connector, you will likely see a blank, black screen when A/V Wizard starts, even if you previously saw the Kubuntu boot splash. You will know that the A/V Wizard is running because you hear a series of beeps. When you hear those beeps, if you have video, proceed to complete the A/V Wizard.

The proprietory Nvidia driver will not work with Gf8xxx cards and some newer Gf7xxx.You can either use the nv driver (not installing the Nvidia one), or install the newest driver from nvidia, problem is that the av wizard will overwrite your driver...

i am having the EXACT same problem,when i boot to blank screen i can go through numbers 1-5, with no result other than a beep after each number... still no video. all was working wonderfully until linuxmce install. i ran the test and everything showed up perfectly with my 6800gt card. My first attempt to install linuxmce.

i am installing this on an old pc to see if it is something i can do and would like.amd64 3000+bfg 6800gtoc<dont' rember which mb, maybe a ad77 infinity dfi board>1gig ram200gb hard drive-----------------

after reading more i wish i was at home, i think i may know how to fix this. could be that i have video plugged in to wrong output. but if that was the case, why would kubuntu work perfectly but avwizzard fail? just curious.....